Business segments (Tables)

12 Months Ended

Dec. 31, 2017

Reconciliation of assets from segment to consolidated

A reconciliation of our consolidated assets to the total of primary aluminum segment assets is provided below.



Segment assets ⁽¹⁾	2017		2016		2015
Primary	$	1,530,975	$	1,492,964	$	1,706,032
Corporate, unallocated	50,666		47,363		46,436
Total assets	$	1,581,641	$	1,540,327	$	1,752,468


⁽¹⁾	Segment assets include accounts receivable, due from affiliates, prepaid and other current assets, inventory, intangible assets and property, plant and equipment — net; the remaining assets are unallocated corporate assets.

Schedule of revenue from external customers and long-lived assets, by geographical areas

Included in the consolidated financial statements are the following amounts related to geographic locations:



	2017		2016		2015
Net sales:
United States	$	938,333	$	808,912	$	1,373,714
Iceland	650,747		510,182		576,143
Long-lived assets: ⁽¹⁾
United States	$	370,029	$	395,107	$	408,722
Iceland	582,981		625,897		801,268
Other	74,957		78,701		94,421


⁽¹⁾	Includes long-lived assets other than financial instruments and deferred taxes.

Schedule of revenue by major customers by reporting segments

Over the last three years, only sales revenue from Glencore exceeded 10% of our net sales. A loss of this customer could have a material adverse effect on our results of operations. The net sales revenue related to Glencore is as follows:



	Year Ended December 31,
	2017		2016		2015
Glencore	$	1,198,076	$	1,178,631	$	1,867,711